Russia has given its first response to Donald Trump’s ultimatum calling on Vladimir Putin to engage in peace talks or see his ...

Ukraine could lose more than one-third of its population by 2100 due to low birth rates, out-migration, and an aging ...

The US president has already declared a national emergency at the border, as he begins his crackdown on immigration.

U.N. Secretary-General Antonio Guterres ratcheted up his warning about climate change and said the world's thirst for fossi ...